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tiny-mole [99]
2 years ago
13

Why is the percent increase from 45 to 75 not equal to the percent decrease from 75 to 45? Select three

Mathematics
1 answer:
Novay_Z [31]2 years ago
5 0

Answer:

For me the answer is

The ratio for the percent increase has a smaller denominator than the percent decrease.

Step-by-step explanation:

From 45 to 75, the increase is 30

If we check the % increased, (30/45)*100 = 66.667%

If we decrease the price from 75 to 45, the amount is same, i.e. 30 but the denominator is changed.

(30/75)*100 = 40%

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You can use the formula a = h/n is you want to find the batting average a of a batter who has h hits in n times at bat. Solve th
Akimi4 [234]
The formula is:
a = h / n.
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3 years ago
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Which choice represents the result when 4 + 6m is subtracted from 15m? Select ALL that apply.
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7 0
3 years ago
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A closet contains n pairs of shoes. If 2r shoes are chosen at random, (where 2r < n), what is the probability that there will
Pie
We are choosing 2
2
r
shoes. How many ways are there to avoid a pair? The pairs represented in our sample can be chosen in (2)
(
n
2
r
)
ways. From each chosen pair, we can choose the left shoe or the right shoe. There are 22
2
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(
2
n
2
r
)
equally likely ways to choose 2
2
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shoes, (2)22
(
n
2
r
)
2
2
r
are "favourable."

Another way: A perhaps more natural way to attack the problem is to imagine choosing the shoes one at a time. The probability that the second shoe chosen does not match the first is 2−22−1
2
n
−
2
2
n
−
1
. Given that this has happened, the probability the next shoe does not match either of the first two is 2−42−2
2
n
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4
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n
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. Given that there is no match so far, the probability the next shoe does not match any of the first three is 2−62−3
2
n
−
6
2
n
−
3
. Continue. We get a product, which looks a little nicer if we start it with the term 22
2
n
2
n
. So an answer is
22⋅2−22−1⋅2−42−2⋅2−62−3⋯2−4+22−2+1.
2
n
2
n
⋅
2
n
−
2
2
n
−
1
⋅
2
n
−
4
2
n
−
2
⋅
2
n
−
6
2
n
−
3
⋯
2
n
−
4
r
+
2
2
n
−
2
r
+
1
.
This can be expressed more compactly in various ways.
4 0
3 years ago
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Marizza181 [45]

Answer:

Step-by-step explanation:

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3 0
3 years ago
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